Electric heater



- 1,509,097 W. J. BISSET ET AL ELECTRIC HEATER I Filed Jung 1 9, 1922 4She ets-Sheet 2 7 IIVVENTOR.

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Sept. 23-, 1924.

w. J. BISSET ET AL ELECTRIC HEATER Filed June 19 1922 4 Sheets-Sheet 5.l l I lllllll rl.

lillllll Sept. 23, 1924. I 1,509,097

w. J. BISSET ET AL ELECTRIC HEATER Filed June 19, 1922 4 Sheets-Sheet 4I I I I I I I I 7 w i/VVENTORS Mm (W flTTORNEY Patented Sept. 2 3, 1924.

UNITED STATES PATENT oFFicE.

iTALL ACE J'- IBISSE'I, OF BLOOMSBURG, AND MORRIS S. EVANS, OE BERWICK,PENNSYL VANIA, ASSIGNORS TO AMERICAN CAR AND FOUNDBY'COWANY, OF NEWYORK, N. Y., A CORPORATION OF NEW JERSEY.

' ELECTRIC HEATER.

Application filed June 19, 1925?. Serial 569,287.

.T all whom it may concern:

- Be it known that we, WALLACE J. Brsslrr and Monms S. EVANS, residingat Bloomsburg, Columbia County, Pennsylvania, and

Berwick, Columbia County, Pennsylvania, respectively, and being citizensof the United States, have invented certain new and useful Improvementsin an Electric Heater, of which the following is a full,

1 clear and exact description, such as will enable others skilled in theart to which it appertains to make and to use the same, reference beinghad to the accompanying drawings, which illustrate the preferred form ofthe invention, though it is to be understood that the invention is notlimited to the exact details of construction shown and described, as itis'obvious that various modifications thereof within the scope of the 2claims will occur to persons skilled in the art.

, In said drawings:

Fig. 1 is a side elevation of our improved heater;

Fig.2 is a front elevation of our improved heater, parts "being brokenaway to show other parts more clearly;

Fig. 3 is a plan view of the movable stops, detached from the rest ofthe heater 30.- structure;

Fig. 4 is a side'elevati'on of a modified form of our device;

Fig. 5 is a front elevation of the structure shown in Fig. 4; and

Fig. 6 is a top plan view, drawn to a larger scale of the structureshown in Fig. 4.

It is an object of our invention to provide an improved electric heaterwhich shall be capable of heating stock of different lengths and it isalso an object of our invention to provide means by which the electrodesmay be readily adjusted to accommodate the diiierent lengths of stock.It is also an object of our invention to provide an improved operatingmeans-for the electrodes and it is also an object of our invention toprovide a heater in which current from two sources is used to heat the 1stock. It is also an object of our invention to provide an improvedmeans for feeding the stock to the electrodes.

With these and other objects in view, our

invention, as shown in Figs. 1 and-2 comprises an electrical heaterhaving asupporting frame composed of spaced flanged side members 1 and2, of irregular shape, joined by .cross members 3 secured to the iiangesof the members 1 and 2. The side members may be formed in any desiredmanner but we have shown them as cast members formed with integralflange portions 4 and 5, respectively, upon which is mounted achannel-shaped cross member or support 6. The member 6 is provided witha row of openings 7 and serves to sup-port a pair of electrodes 8 and .9which rest'upon insulation 10 and are secured to the support 6 by thebolts 11, also insulated from the support 6, which pass through theopenings 7. The row of openings 7 serves as a means for positioning theelectrodes 8 and 9 so as to accommodate stock of any length up to thelimit of the apparatus.

Cooperating with the electrodes 8 and 9, I

respectively, are the electrodes 12 and 13. The electrodes are supportedby rods 14 connected by insulating couplings 15 to sleeves 16 slidablymounted upon a rod 17 and held in adjusted positions upon the rod by setscrews 18. The rod 17 is carried by sleeves or boxes 19 slidably mountedin slots 20 in the side members 1 and 2 and normally forced to theirlowermost position by springs 21, the force of which may be adjusted byadjusting screws 22 mounted in brackets 23 which close the upper ends ofthe slots 20.

To operate the rod 17 an'dboxes 19 in theslots 20 there is provided ateach end of the heater, a lever 24 pivotally supported by the adjacentside member as at 25, and pivotally connected, intermediate its ends, toa link 26 which has its other end pivotally connected to an end of alever 27. The lever 27 is mounted on a shaft 28 carried by the sidemembers 1 and 2 and has its other end rounded, as at 29, and engaginga'roller 30 mounted upon the rod 17. To permit of adjusting its length,the link 26 is formed of sections joined by a turnbuckle 31. Surroundingthe rod 26 is a spring 32 which is confined between a collar 33 fixed onthe" rod and a bracket 34 formed integral with the side member andthrough which the rod '26 passes. Connecting the levers 24 is a rod 35which is engaged by the operator to operate the levers 24.

The side members 1 and 2 are also pro Q incense vided with inclinedflanges 36 and 37 upon which is mounted a. support 38 for supporting thestock to be heated, shown in Figs. 1 and 2 as round bars 39. In order tohold the bars 39 on the support 38 and to feed them to the electrodesone at a time, movable stops 40 and 41,, adapted to project throughopenings in the support 38, are

provided. Thestops are movab y mounted in a guide bracket 42formed'integral with the support 38 and are provided with racks 43 and44, respectively, which engage opposite sides of a pinion 45 so thatoperation of the pinion 45 will cause one stop to be drawn below theupper surface of the support 38 and the other stop to be projected abovethe support. Reversing the operation of the pinion 45 will reverse thepositions of the stpps. It will be noted that the stops 40 and 41 arespaced apart so that when stop 40 is retracted and stop 41 projected therods 39 roll down the support 38 and engage the stop 41. VThen the stop40 is projected and the stop 41 retracted, the stop 40will be forcedbetween the two lowermost bars so that all bars but the lowermost barwill be held by the stop 40 while the retracl spaced as desired, across.the machine. The shaft 46 is operated by cranks 47 mounted tion of thestop 41'w1ll release the lowermost bar and permit it to roll down thesupport 38 to the electrodes. V

The pinion is mounted upon a shaft 46 journaled in the side members 1and 2 While we have shown but one pinion 45 on the shaft 46 it is to beunderstoo'dthat a.

plurality of pinions 45 may be operated by the one shaft 46 and operatepairs of stops,

upon the ends of the shaft 46 and connected by adjustable links 48 tothe ends of leversv 49 which are pivotally mounted, intermediate theirends, as at 50, upon the side members 1 and 2. Links 51, which passthrough brackets 52 and are providedwith yoke-shaped ends having pin andslot connections with levers 24, operatively connect the other ends ofthe levers .49 to the levers 2 4. Springs 53, which surround the'links51 and are confined .between the brackets 52 and collars 54 secured onthe links 51,

are adaptedto return the stops40 and 41 to their normal positions.

"-To stop the rods in position on the electrodes 8 and 9 after theyhavebeen released .-by the retraction ojfthe stop 41, stops 55 are provided.The stops '55 are mounted upon rods 56 to which they are conected I I byinsulating connectors 57. The rods are guided in openings in the support6 and are connected to cranks 58 mounted-ona shaft 59 journaled in theside members :1

and 2. Cranks 60 mounted .ontheends of the shaft 59 connect the shaft 59to the links 1,111 the operation of our device when their normal "sothat there is an opportunity for the rods 39 to pass on to theelectrodes 8 and 9 and constructed as described above, pressing down thecross bar will operate levers 24, links 26 and levers 2'? ts raise therod 17 against the action of springs and 32 and raise the electrodes 12and 13, the pins 61 traveling in the slots 62 in the ends 63 of thelinks 51 until the pins 61 engage the bottoms of theslots, the slots 62being of suficientgwidth to permit the movement of the pin. 61,whereupon the links 51 will be operated against'the action of springs53, op-

erating'cranks 60 to withdraw the stops 55 and permitting the bar 39, ifany, held upon the electrodes 8 and 9 to roll down the electrodes and bereceived upon the support 6.

The rods '39 are held on the support 6 by the projecting ortions 64 ofthe side members l and 2or' y projections which may be provided onmember 6. The operation of the links 51 also operates the lever 49, link48 and crank 47, operating the pinion 45 andwithdrawing the stop 40 andproject ing the stop 41 thus allowing the bars 39 to to I advance to.engage the stop 41. When the pressure upon the rod 35 is removed and therod-allowed to return, the stops 55 will be.

projected into position to hold the bars upon the electrodes 8 and .9and the stop 40 is projected. between the two lowermost bars,

- olding all save the lowermost bar while the stop 41 is withdrawn andthe lowermost bar releasedto roll down the support 38 on to' theelectrodes 8 and-9 and engage the stops 55.. The stops 40, 41and55 arerestored to posltions before the levers 24 engage thestops 55 before theelectrodes 12 ion and 13 descend and engage the bar. Cur I rent forheating the bars is supplied to the electrodes through flexibleconductors 65,

the source of current supply bein such that the current will passthrough t e bar fromen'd to end in two paths, one path being fromelectrode 8 to electrode 9 and the -vertically projecting angle bars73,74 and bar having one flange 75, 76, each angle secured to the adjacentbase member and one flange cut awa so as torest upon the base member andal the bars/being arranged,

as shown in ig. 6, so that they will em- .brace the vertical edges ofthe rectangular laminated core 77 of a transformer 78. En-

gaging the angle. bars 73, 74, 75 and 76 are i which rest the spacedbelow and above the core, respective y, and

also serve to. hold the .angle bars ti htly against-the cover plates 82which are p aced between the sides of thecore- 77 and the angle bars.Bolts 83, passing below the core 77 hold the lower portions of theplates against the core. On the upper surface of the core 77 isplaced'insulatibn 84 upon A qrimary lcoils 85 of the transformer 78. 85are placed the secondary coils 86 and 87, insulating separators 88 beingplaced between each secondary coil and the adjacent primary coil. 1 I

The electrode-.89 of the secondary coil 86 is adjustably supported by aninsulated 20 bolt 90 from a strap 91 which is connected to" the fillermembers 7 9, by the bolts 81 while the other electrode 92 of the coil 86is adjustably supported by an insulated bolt "93 from a strap 94 securedto the filler members 79. The bolt 93 engages the coil 86 a shortdistance 'below the e ectrode 92 while the electroden92 is yieldinglyconnected to an insulated strap 95, carried by the filler members 79, bya bolt 96 slidably mounted in an opening in-the strap 95 and carrying aspring 97 confined between the strap 95 and a nut 98 on the bolt 96.This construction permits the electrode 92, which is normally inclined,to move slightly when subjected to pressure, the inclination being tooslight to be clearly shown in the drawing. The electrodes 99 and 1000fthe secondary coil 87 are connected by,insulating connectors 101 tosleeves 102 slidably mounted on a rod 103 and normally held in fixedpositions on the rod by set screws 10 1. The rod 103 is mounted inblocks 105 slidably mounted in slots 106 in guide members 107 secured tothe filler members/ 79 by bolts 108. lhe blocks 105 are pressed to theirlowermost positions by springs 109, the force of which is regulated byadjusting screws 110 mounted in brackets 111 which close the open endsof the slots 106. Ontheends of therod 103 are mounted rollers 112engaged by cams 113 mounted on a shaft 114 journaled in the guidemembers 107 and having mounted thereon a crank115 which is connected bya link 116 to one end of a lever .117. The lever 117 is pivotallymounted in'a-bracket 118 carried by the angle bar 72 .and has a pedal119'pivotally' connected to" its other end.

It will be noted" that the contact of the electrodes 89 and 92 with theobject to beheated will complete the circuit through the secondary. coil86 and that contact of the Y electrodes 99 and 100 with the object willcomplete the circuit through the secondary coil 87, the circuits of thesecondary coils etween the coils V having-only the objectto be heated incommOIL"-1 Connecting the electrodes 89 and 92 to one secondary coil andthe electrodes 99 and 100 to another secondary coil permits of the useof secondary coils of less current carrying capacity'than where all theelec- 'trodes are connected to one secondary coil and the secondarycoils are n consequence ,muchmorereadily manufactured and re piece andreduces the tendency to arcing at Y the electrodes.

In the operation of the device shown" in i Figs. 4t, 5 and 6 depressingof the pedal 119 will operate the lever 117 and cams 113 to raise theelectrodes 99 and 100 against the action ofsprings 109 to permit theinsertion and removal of the stock and removal of the ressure from thepedalwill permit the spr1 ngs109"to. force the electrodes 99 and 100into engagement witlr the stock andto holdthe stock in contact with theelectrodes 89 and 92. I

It will be apparent that the source of current 'for the device shown inFigs. 1, 2 and '3 may lee similar to the transformer shown in Figs. 4:,5 and 6 and that the transformer may be mounted on the machine frame orplaced on the floor near the machine.

What we claim is:f 1.'In an electric heater, normally fixedelectrodes'adapted to complete a circuit upon engagement by the stock,movable electrodes cooperating with said fixed electrodes and adapted tocomplete a second circuit upon I engagement with the/work and meansadapted to operate said movable electrodes to I make and break saidsecond circuit.

2. In an electric heater, normally fixed electrodes adjustablehorizontally and adapted to complete a circuit upon engagement y thestock, movable electrodes adjustable horizontally to cooperate with saidfixed adapted to hold said electrodes in engage Y ment with the stockheated.

4: In an electric heater, coo rating fixed V and movable electrodes,stock means and-stops adapted to position the stock on said fixedelectrodes. I

In an'electric heater, cooperating fixed and movable electrodes, stopsadaptedlto &

hold the stock on said fixed electrodes and operating means for saidmovable electrodes adapted to operate said stops to release the stockfrom the fixed electrodes.

6. In an electric heater, cooperating fixed and -movable electrodes,means adapted to feed stock to said fixed electrodes and oper atingmeans for said movable electrodes adapted to operate said stock feedingmeans.

7 Inan electric heater, cooperating fixed and movable electrodes, meansadapted to feed stock to said fixed electrodes, stops adapted toposition the stock on said fixed electrodes and operating means for saidmovable electrodes adapted to operate said stock feeding means and saidstops.

8. In an electric heater, cooperating fixed and movable electrodes,means adapted to feed stock to said fixed. electrodes, stops adapted toposition the stock on said fixed electrodes, an operating means for saidmovable electrodes and. an operating means for said stock feeding meansand said stops having a lost motion connection with said electrodeoperating means.

9. In an electric heater, cooperating fixed and movable electrodes,inclinedstock sup porting means, stock feeding means adapted to releasethe stock on said supporting-means upon operation of said movableelectrodes and stops adapted to'position' the stock on said fixedelectrodes.

10. In an'electric heater, cooperating fixed and movable-..elctrodes,means adapted to feed stock to; said fixed electrodes, stops adapted toposition the stock to complete'a circuit through Said fixed electrodesand means adapted to operate said movable electrodes to. complete asecond circuit through said work.

11. In an electric heater, cooperating fixed and movable electrodes andmeans for feeding stock to said fixed electrodes comprising i a stopnormally engaging the stock and adapted to release the stock and asecond stop adapted to engage the stock upon movement of said movableelectrodes from said fixed electrodes, said first'stop being adapted toengage and hold some of the stock and said secondst'op being adapted torelease the

